Rearrange the formula to calculate energy. If a portable phone needs two watts to operate and it is used for 15 seconds, how many joules will have been used?
What do you know?

When someone slams her books on a table the kinect energy is transferred into vibrations that travel to your ears as sound waves which statement describes the movement of those waves

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.